29results about How to "Delay thermal runaway" patented technology

The invention provides a battery monomer, a battery device and a power utilization device. The battery monomer comprises a positive pole piece, a negative pole piece, an isolating membrane and a functional coating, the positive pole piece comprises a positive current collector, the positive current collector comprises a main body part and a tab part, the main body part is provided with a first edge region and a second edge region, the first edge region is connected with the tab part, and the second edge region is arranged far away from the tab part; the negative pole piece comprises a negative current collector; the isolating membrane is located between the positive pole piece and the negative pole piece, the isolating membrane is provided with a third edge area and a fourth edge area, the orthographic projection of the third edge area in the first edge area is overlapped with the first edge area, and the orthographic projection of the fourth edge area in the second edge area is overlapped with the second edge area; the functional coating is located in at least one of the first edge area, the second edge area, the third edge area and the fourth edge area. According to the battery cell provided by the invention, the reliability of the battery cell can be improved.

The utility model provides a cooling device, an electric assembly and electric equipment. A flow guide cavity and a containing cavity are defined in the cooling device, the containing cavity is not communicated with the flow guide cavity, the flow guide cavity is used for guiding a cooling agent, and the containing cavity is used for containing substances sprayed out of the battery through the explosion-proof valve. According to the cooling device in the scheme, the flow guide cavity is arranged, so that the coolant can flow in the flow guide cavity, the heat dissipation efficiency of the battery assembly is improved, the temperature of the battery assembly is reduced, and the possibility of thermal runaway is reduced. Through the arrangement of the accommodating cavity, when thermal runaway of the battery occurs, generated pressure or leaked electrolyte is released into the accommodating cavity in time. According to the utility model, the diversion cavity and the accommodating cavity are integrated, so that the stability and the safety of the battery assembly are improved, and the service life of the battery assembly is prolonged.

The invention relates to a polymer electrolyte, in particular to a fluorophosphonate-based solid polymer electrolyte and application thereof in a secondary battery (lithium / sodium battery). The solid polymer electrolyte is obtained by in-situ polymerization of various substances in the lithium battery, the various substances comprise a monomer, a metal salt, an additive and an initiator, and the monomer is a fluorophosphonate-based monomer or a fluorophosphonate-based monomer and other monomers; the fluorophosphonate-based monomer comprises an acrylic acid derivative, a urea bond and a fluorophosphate structural unit. The polymer electrolyte disclosed by the invention has a wide electrochemical window and high ionic conductivity; and through the synergistic effect of various flame-retardant elements, the flame-retardant plastic has excellent flame retardance. Meanwhile, when the polymer electrolyte is applied to the secondary battery, protective layers rich in inorganic components such as fluorine and nitrogen can be formed on the positive electrode side and the negative electrode side, the cycle performance of the battery can be improved, thermal runaway can be delayed, and more escape time can be won for people.

The invention provides a preparation method of a porous light composite current collector, which comprises the following steps: depositing metal nano activation layers on two surfaces of an insulating support layer to obtain a first composite current collector; depositing on two surfaces of the first composite current collector to form an aluminum or copper metal coating so as to obtain a second composite current collector; and performing laser drilling on the second composite current collector to form a plurality of through holes which are through up and down so as to obtain the porous light composite current collector. The current collector obtained by the method is of a porous and light five-layer sandwich structure, and the conductivity, the safety performance and the cycle performance of an electrode material are improved.

The application discloses a kind of composite multifunctional lithium metal negative and its preparation method and application, it is related to lithium ion battery technical field.The preparation method of a kind of composite multifunctional lithium metal negative includes the following steps: lithiumophilic nanoparticle is added to N-methyl pyrrolidone solution, is fully dispersed and is coated on copper foil dry, obtain lithiumophilic nanoparticle layer;Lithium negative electrode surface is cleaned and preheating treatment;Lithiumophilic nanoparticle layer is transferred to lithium foil;Lithium foil is evaporated, and thin film is deposited on the surface of lithium foil base bed;Lithium foil after evaporation is cooled and solidified, and composite multifunctional lithium metal negative is obtained.The application solves the problem that lithium deposition is not uniform, causes dendrite growth, interface side reaction triggers irreversible loss, the structure performance of existing SEI layer is insufficient and material interface bonding force is weak.

The utility model provides a battery pack and an energy storage system, and relates to the technical field of energy storage. The battery pack comprises a battery box body, a plurality of battery modules, a first support, a second support and a third support, a battery bin is formed in the battery box body, the battery modules are located in the battery bin, and each battery module comprises a plurality of single batteries arranged in the first direction; wherein in the first direction, a support is arranged between every two adjacent battery modules and at least one of one end of each battery module and the other end of each battery module, a plurality of energy absorption grooves are formed in each support, and crushing guide grooves are formed in the groove walls of at least part of the energy absorption grooves, so that the buffering and vibration reduction performance of the battery pack is improved.

The utility model discloses a battery pack and a power plant, the battery pack comprises: a housing, in which an accommodating cavity is defined, the housing comprises a housing body and a cover plate; the battery module is arranged in the accommodating cavity; the cold plate is arranged in the containing cavity and located on the lower side of the battery module, the upper surface of the battery module is connected with the cover plate, and the lower surface of the battery module is connected with the cold plate. According to the battery pack disclosed by the utility model, the upper surface of the battery module is connected with the cover plate, and the lower surface of the battery module is connected with the cold plate, so that the Z-direction size of the battery pack is reduced, the modality and rigidity of the battery pack are improved, and the requirement that the upper cover is not obviously deformed when the battery pack and the whole vehicle are sealed is met; and the requirements of 800V and 4C fast charging are met.

The invention relates to the technical field of lithium ion batteries, in particular to a battery diaphragm, a preparation method of the battery diaphragm and a lithium ion battery, and the battery diaphragm comprises a flexible film substrate, and a ceramic coating and a polydopamine coating which are sequentially arranged on the surface of the film substrate from inside to outside. According to the technical scheme, the ceramic coating and the polydopamine coating are compounded on the membrane substrate, so that the electrolyte affinity and the thermal stability of the battery diaphragm can be effectively improved, and the electrochemical performance and the use safety of a battery can be improved.

This invention belongs to the field of batteries, specifically a single-cell battery and a high-capacity battery, overcoming the technical difficulties of high cost and heavy weight in existing high-capacity batteries. The single-cell battery includes a casing, which is formed by an upper cover plate, a cylindrical body, and a lower cover plate. The upper cover plate, cylindrical body, and lower cover plate are all made of plastic, and their strengths are all P, where P1≤P≤P2. P1 represents the strength requirement of the casing during the formation stage and normal charge / discharge stages; P2 represents the strength requirement of the casing during thermal runaway. At least one of the upper cover plate, cylindrical body, and lower cover plate has a sub-tube segment, which communicates with the inner cavity of the casing. The high-capacity battery includes a pressure-bearing casing and single-cell batteries arranged within the pressure-bearing casing. Corresponding sub-tube segments in adjacent single-cell batteries are sealed and connected to form a shared pipeline. The single-cell battery of this invention is low in cost and lightweight, and the pressure-bearing casing meets the strength requirements of the casing during thermal runaway.

This invention belongs to the field of batteries, specifically a high-capacity battery assembly. It overcomes the technical challenges of high cost and heavy weight inherent in existing high-capacity batteries. The assembly includes a pressure-bearing casing and a high-capacity battery and heat exchange device located within the casing. The high-capacity battery comprises a shared pipeline and n individual cells arranged along the x-direction, with their internal cavities connected by the shared pipeline. Each individual cell has a plastic casing with a strength P, where P1 ≤ P ≤ P2. P1 represents the strength requirement of the casing during the formation stage and normal charge / discharge stages, while P2 represents the strength requirement during thermal runaway. The pressure-bearing casing has a vent connected to the shared pipeline. The heat exchange device is located at the top of the high-capacity battery, with the polarity terminals of each individual cell passing through it. Compared to finished battery cells, the individual cells of this invention offer advantages in terms of light weight and low cost.

The utility model relates to a battery and an electric device. The battery comprises an outer box, a battery unit, a heat exchange plate and a phase change plate, the outer box is provided with a containing cavity, the battery unit, the heat exchange plate and the phase change plate are all located in the containing cavity, and the phase change plate is arranged on the side, opposite to the battery unit, of the heat exchange plate in an overlapped mode. According to the battery and the electric device, the risk of thermal runaway can be reduced.

The invention relates to the technical field of current collectors, and provides a composite current collector, a pole piece, energy supply equipment and a power utilization device.The composite current collector comprises a guide channel layer, a first metal layer and a second metal layer, the guide channel layer comprises a first surface and a second surface which are oppositely arranged in the thickness direction, and a via hole is formed in the guide channel layer; the via hole penetrates through the first surface and the second surface; the first metal layer is connected to the first surface, and the second metal layer is connected to the second surface. The composite current collector further comprises a flame-retardant functional layer, and the flame-retardant functional layer is arranged between the first surface and the first metal layer. The composite current collector provided by the invention has better use performance.

The utility model relates to a battery pack and a vehicle, the battery pack comprises a plurality of battery pack units, each battery pack unit comprises a pressure relief component arranged in the horizontal direction and two battery units symmetrically arranged about the pressure relief component, and the length direction of the battery units is consistent with the length direction of the pressure relief component. Each battery unit comprises a plurality of single batteries, the anti-explosion valves of the single batteries in the same battery unit face the same direction, the sides, where the anti-explosion valves are located, of the two battery units in the same battery pack unit are oppositely arranged, and pressure relief channels are formed in the two sides, in the length direction of the pressure relief component, of the pressure relief component in a penetrating mode; and the pressure relief channels on the two sides of the pressure relief component are respectively opposite to and communicated with the anti-explosion valves of the two adjacent battery units. Through cooperation of the pressure relief component and the pressure relief channel, heat and other products generated during thermal runaway of the battery monomers can be timely discharged to the outside of the battery pack, so that the safety performance of the battery pack is improved.

The utility model is suitable for the technical field of temperature control, and provides a battery PACK box. The battery PACK box comprises N batteries which are connected in series or in parallel, and further comprises N semiconductor cooling fins, a heat pipe, N driving circuit modules and a control module, wherein N is a positive integer; each semiconductor cooling fin corresponds to one battery, the input ends of the semiconductor cooling fins are connected in series and then connected with the output end of the driving circuit module, the input end of the driving circuit module is connected with the output end of the control module, and the input end of the control module is used for inputting a preset temperature; the N semiconductor cooling fins are connected through heat pipes, and the head ends and the tail ends of the heat pipes are connected with an externally-hung air conditioning unit. According to the utility model, the semiconductor radiating fins are adopted, so that the installation and maintenance are simple, the control module is adopted to control the temperature through the semiconductor radiating fins, the refrigeration time is short, and the temperature control precision is high.

The utility model provides a heat dissipation structure of a battery cell module and the battery cell module, the heat dissipation structure comprises a battery cell group, a shell and a heat dissipation piece, the battery cell group comprises at least two battery cells; an accommodating cavity is formed in the shell, a mounting groove communicated with the accommodating cavity is formed in one side of the shell, and the battery cell group is arranged in the accommodating cavity; one end of the heat dissipation piece penetrates through the mounting groove and extends into the accommodating cavity, the other opposite end of the heat dissipation piece extends to the outside of the shell and is connected with heat dissipation equipment, and two adjacent battery cells in the battery cell group are attached to the heat dissipation piece. The heat dissipation piece is arranged in the middle of the battery cell group, and the heat dissipation piece penetrates through the mounting groove and is attached to the two adjacent battery cells, so that heat generated in the middle of the battery cells can be effectively guided to the heat dissipation piece. Therefore, heat can be dispersed, and the problem that the middle part of the battery cell group is overheated is prevented. Meanwhile, through connection with external heat dissipation equipment, heat can be released more effectively, and the overall heat dissipation effect is improved.

The application relates to a preparation method of an artificially modified CEI material, and the preparation steps comprise the following steps: mixing polymer monomers, a crosslinking agent, an organic plasticizer, a lithium salt, a photoinitiator and a diluent to obtain a precursor solution; performing spin coating on the surface of a high-nickel ternary positive electrode, standing to make the precursor solution fully wet, using a purple light lamp to initiate polymerization, and performing vacuum drying to obtain a high-nickel ternary positive electrode with an artificially modified CEI layer. The artificially modified CEI material is prepared by in-situ polymerization reaction of polyethylene glycol diacrylate and a fluorine-substituted product of ethylene carbonate, is used for a lithium metal battery positive electrode, can effectively stabilize the electrode / electrolyte interface, inhibit electrolyte decomposition and transition metal dissolution, reduce the occurrence of side reactions, and improves the cycle stability of the lithium metal battery.

The invention belongs to the field of composite phase-change materials, and particularly discloses a phase-change functional material with a wide temperature range and a preparation method of the phase-change functional material. The wide-range phase transition temperature heat absorption and heat insulation functional material mainly comprises the following components in parts by mass: 15-30 parts of polyethylene glycol, 20-40 parts of sodium acetate trihydrate, 1-4 parts of expanded graphite and 5-10 parts of epoxy resin glue. According to the wide-range phase change temperature heat absorption and heat insulation functional material, by adjusting the adding amount of polyethylene glycol and sodium acetate trihydrate, high phase change enthalpy values of two or more phase change temperature intervals are achieved, the heat absorption and temperature control effects of a lithium ion battery under the full working condition and the full temperature range are effectively achieved, and the use safety of the lithium ion battery is improved.

The present invention provides a light and thin heat-insulating / flame-retardant sheet for use between battery cells in a battery pack in which battery cells are connected in series or in parallel and stacked. The heat-insulating / flame-retardant sheet has a thickness of 3 mm or less and is obtained by a papermaking process using a suspension containing 25-70 wt% of silica inorganic fibers having hydroxyl groups, 2-25 wt% of glass fibers, 5-40 wt% of a fiber mineral, 3-20 wt% of a binder, and 0-45 wt% of heat-insulating inorganic particles. The heat-insulating inorganic particles include hydrophilized aerogel particles obtained by treating the surface of hydrophobic aerogel particles having a porosity of 80% or more and an average particle diameter of 5-200 [mu] m with a hydrophilizing agent.

The application provides a kind of optical storage system cluster SOH equalization control method, device and electronic equipment, belong to energy storage technical field.The method includes determining the SOH average value and SOH standard deviation of the optical storage system cluster according to the SOH data of all energy storage subsystems, in the case where the SOH standard deviation is greater than or equal to a preset value, the SOH data of each energy storage subsystem is compared with the sum of the SOH average value and the SOH standard deviation, the corresponding power allocation strategy is determined according to the comparison result and the power allocation is carried out according to the power data.The application takes SOH standard deviation as a key decision indicator, dynamically switches the optical storage system cluster from "non-discriminatory working mode" to "differentiated protection mode", delays the decay rate of all energy storage subsystems, and prolongs the average life and discharge capacity of the entire cluster throughout the life cycle.

The invention discloses a cross-linked polyethylene insulated flame-retardant power cable applied to the field of cables, and the cable is provided with a plurality of flame-retardant daughters on each battery cell, so that the cable not only can play a role of a firewall when a fire occurs, but also can release flame-retardant liquid through a self-spraying flame-retardant bag to prevent the fire from spreading along the cable, so that the flame-retardant daughters can play a role of fire protection. In addition, the cable can also monitor the overheating stage of the cable before a fire disaster occurs, an alarm is given at the early stage of overheating, active defense is achieved, the multiple flame-retardant sub-bodies on each battery cell cool the cable through circularly flowing cooling liquid, and after the overheating area is monitored, the multiple flame-retardant sub-bodies are linked to enhance the cooling effect on the overheating area, so that the safety of the cable is improved, and the service life of the cable is prolonged. In addition, after a fire disaster occurs, the cooling liquid and the liquid flame retardant are mixed through the flame-retardant parent body and transmitted to the flame-retardant child body for flame retardance, fire spreading is effectively prevented, and precious time is gained for cutting off a power source.

A battery pack for a vehicle includes: a plurality of battery modules disposed on a plane; a lower case that forms an accommodation space surrounding the lower and lateral sides of the plurality of battery modules; a battery pack cover plate coupled to the upper part of the lower case so as to cover the upper part of the accommodation space; a plurality of internal members provided in the accommodation space so as to separate the plurality of battery modules from each other; and a heat insulator provided between the battery pack cover plate and the internal member so as to thermally isolate the battery modules separated by the internal member.

The invention relates to an electrolyte, a secondary battery and a device, the electrolyte comprises a lithium salt, a solvent, a first additive and a second additive, the first additive comprises at least one of compounds shown as a formula I, and the second additive comprises at least one of compounds shown as a formula II; the second additive comprises at least one of compounds as shown in a formula II and a formula III: # imgabs0 #. By using the electrolyte provided by the invention, the reaction speed of the electrolyte and a positive electrode under a mechanical abuse condition can be effectively reduced, the thermal runaway of the battery can be delayed, and the capacity retention ratio of the battery can be effectively improved.

Disclosed is a device and method for preventing thermal diffusion of a battery pack. In the device, at least one temperature sensor is provided on the battery pack to measure its temperature data; a controller is connected to the temperature sensor, and when the temperature data exceeds a predetermined threshold, the controller generates a trigger signal; at least one fire extinguishing agent spraying device is installed above the battery pack and is communicatively connected to the controller, the fire extinguishing agent spraying device mixes powder and sprays based on the trigger signal, the powder bin includes at least two compartments to separately and separately accommodate at least two kinds of powder, the powder reacts and absorbs heat after mixing, the bottom plate is openably provided at the bottom of the powder bin, the mixing bin is located below the bottom plate, the mixing bin is provided with a stirring device for mixing at least two kinds of powder from the powder bin into cooling materials, and the spraying bin is connected to the mixing bin to spray cooling materials toward the battery pack to cool the battery pack. The device effectively prevents and quickly prevents the occurrence of thermal runaway and thermal diffusion of the battery.

This invention provides an immersion-type energy storage battery housing, belonging to the field of energy storage technology. It includes a cold plate housing, a lower shell, and a top cover. Coolant flows inside the cold plate housing, placing the battery cell modules and the immersion liquid within a closed cavity formed by the cold plate housing, lower shell, and top cover. The immersion liquid insulates the battery cell modules from oxygen. Through heat conduction, the coolant exchanges heat with the immersion liquid, thereby cooling the battery cell modules. This immersion-type energy storage battery housing provides a non-flowing immersion liquid while allowing the coolant to circulate. This avoids problems caused by immersion liquid flow, effectively reducing thermal runaway of the battery cell modules, lowering safety risks, maintaining consistent temperature of the battery cell modules, and extending the service life of the energy storage system.

This application provides a battery thermal management control method, apparatus, electronic device, and storage medium. The method acquires the cell temperature generated by Joule heating within the battery device and the surface temperature of the battery top cover. If a first difference between the surface temperature and the cell temperature is greater than a preset temperature threshold, the battery device is heated to increase its temperature, and the surface temperature is corrected based on a first temperature correction coefficient to make the first difference less than or equal to the preset temperature threshold. If a second difference between the cell temperature and the surface temperature is greater than the preset temperature threshold, the battery device is cooled by heat dissipation, and the surface temperature is corrected based on a second temperature correction coefficient to make the second difference less than or equal to the preset temperature threshold. By combining heating or heat dissipation with a temperature correction coefficient, temperature fluctuations are controlled within the preset threshold, effectively avoiding battery performance degradation caused by temperature deviations, minimizing the risk of localized overheating or overcooling of the cell, and reducing the probability of thermal runaway.

The application relates to a composite current collector based on ECI, a preparation method thereof and a lithium battery. The preparation method of the composite current collector comprises the following steps: mixing a high-molecular polymer, a first flame retardant and a compatibilizer, and then performing granulation to prepare composite granules; sequentially performing melt extrusion and flow casting on the composite granules to prepare a flow casting blank film; and sequentially performing first stretching, first setting, second stretching and second setting on the prepared flow casting blank film to prepare a high-molecular base film; the direction of the first stretching is perpendicular to the direction of the second stretching, the temperature of the second stretching is higher than that of the first stretching, and the temperature of the second setting is higher than that of the first setting; a flame-retardant layer is prepared on at least one side of the high-molecular base film to obtain an intermediate; a copper layer is prepared on at least one side of the intermediate to prepare the composite current collector. The application constructs an environment-controllable ECI safety control system, improves the flame-retardant safety performance of the composite current collector, meanwhile, excellent mechanical strength and flexibility are reserved, and the thermal safety performance of the lithium battery is effectively improved.

The present invention belongs to the technical field of batteries, and specifically relates to an explosion-proof combination valve, comprising an explosion-proof chamber (1) provided with a through hole (11); an outer explosion-proof plate (2) provided above the through hole (11); an inner explosion-proof plate (3) provided below the through hole (11); the explosion-proof chamber (1), the outer explosion-proof plate (2) and the inner explosion-proof plate (3) form a closed space for accommodating explosion-proof materials, the closed space contains explosion-proof materials, and the inner explosion-proof plate (3) ruptures under set conditions to release the explosion-proof materials into the battery. The present invention can slow down the thermal runaway inside the battery and improve the safety of the battery. In addition, the present invention also discloses a top cover and a battery.

This invention belongs to the field of battery technology. It provides a lithium-manganese battery, its manufacturing method, and an electrical device. The positive electrode active material in the positive electrode sheet of the lithium-manganese battery includes manganese dioxide. The separator of the lithium-manganese battery includes a base film and a functional coating disposed on the base film. The functional coating includes a mixture of inorganic solid electrolyte and aramid fiber. By combining the solid electrolyte and aramid fiber to form the functional coating on the base film, on the one hand, more uniform positive and negative electrode interface contact can be provided, promoting efficient ion transport; on the other hand, the inorganic solid electrolyte is non-flammable, and combined with the high strength characteristics of aramid fiber, the separator formed after coating can significantly reduce the risk of thermal runaway or fire in the battery.